CVE-2026-97960: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel: Prevent drain_pebs() reentry The PEBS buffer is shared by all events on a CPU, so drain_pebs() must not be reentered. If so, one instance may observe stale buffer state and potentially access out-of-bound memory. Most invocations happen in NMI context, which naturally prevents reentry. However, drain_pebs() is also reachable from process context via intel_pmu_drain_pebs_buffer(). In those paths, the PMU is often already disabled, but not guaranteed. For example, __intel_pmu_pebs_disable() only disables the target counter, so other active counters can still raise a PMI and interrupt an in-flight drain_pebs(). Here is an example, __perf_addr_filters_adjust() perf_event_stop() __perf_event_stop() x86_pmu_stop() (event->pmu->stop) intel_pmu_disable_event() intel_pmu_pebs_disable() __intel_pmu_pebs_disable() intel_pmu_drain_large_pebs() intel_pmu_drain_pebs_buffer() Introduce __intel_pmu_quiesce() and __intel_pmu_resume() helpers and use them in intel_pmu_drain_large_pebs() to disable the full PMU around the intel_pmu_drain_pebs_buffer() call, preventing reentry. Also add a warning in intel_pmu_drain_pebs_buffer() when the full PMU is not disabled.

Засегнати продукти

• Linux Linux: b752ea0c28e3f7f0aaaad6abf84f735eebc37a60 преди 9882068ed242fcd4743f53027e8c790e88dcafff; b752ea0c28e3f7f0aaaad6abf84f735eebc37a60 преди 999e482fdf89400cc1ae937680fc05096b4c915b; b752ea0c28e3f7f0aaaad6abf84f735eebc37a60 преди a5fe19dd8b3ed5fad6e5e0f0c58c7245043ee4af; b752ea0c28e3f7f0aaaad6abf84f735eebc37a60 преди c55599c0ec2aa020e41a0599c3044c56d8a2e7d9; b752ea0c28e3f7f0aaaad6abf84f735eebc37a60 преди a56c03a397e2cd0c4cf8da96dcd6214f7d0e7d8c; a9165207b2b07415eeb01b3ac8bb84976ec96984; 6.3.7 преди 6.4
• Linux Linux: 6.4; преди 6.4; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.53 до 6.18.*; 7.2.7 до 7.2.*; 7.3 до *

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-97960
• https://nvd.nist.gov/vuln/detail/CVE-2026-97960
• https://git.kernel.org/stable/c/9882068ed242fcd4743f53027e8c790e88dcafff
• https://git.kernel.org/stable/c/999e482fdf89400cc1ae937680fc05096b4c915b
• https://git.kernel.org/stable/c/a5fe19dd8b3ed5fad6e5e0f0c58c7245043ee4af
• https://git.kernel.org/stable/c/c55599c0ec2aa020e41a0599c3044c56d8a2e7d9
• https://git.kernel.org/stable/c/a56c03a397e2cd0c4cf8da96dcd6214f7d0e7d8c